Light-emitting device with yellow color filters
A light-emitting device is provided. The light-emitting device includes a substrate including a plurality of pixels, each pixel including a plurality of subpixels designed to emit light with different colors. The plurality of subpixels includes a first subpixel designed to emit red light, a second subpixel designed to emit green light, and a third subpixel designed to emit blue light. The first subpixel includes a first light source formed on the substrate, a red light-emitting layer covering the first light source, and a first yellow color filter covering the red light-emitting layer. The second subpixel includes a second light source formed on the substrate, a green light-emitting layer covering the second light source, and a second yellow color filter covering the green light-emitting layer. The third subpixel includes a third light source formed on the substrate. A method for fabricating the light-emitting device is also provided.
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The invention relates to a light-emitting device, and more particularly to a light-emitting device with yellow color filters covering a red light-emitting layer and a green light-emitting layer, and a method for fabricating the same.
Description of the Related ArtMicro-LED (also known as mLED or μLED) is a display technology that is based on tiny (hence, micro) LED devices that are used to directly create color pixels. Micro-LED displays have the potential to create highly efficient and great-looking flexible displays, to challenge the current market dominance of high-end OLED displays.
An ideal case is to have R/G/B LED on a substrate. But it is difficult to mass produce. Many companies try to have an alternative solution. One is disposing only deep-blue (DB) or blue (B) chips on a substrate. However, for the wavelength conversion layer (e.g. including phosphor or quantum dot), it's difficult to have a pure color transformation from DB or B. Some noise will exist, e.g. green light mixed with a little blue light or red light mixed with a little blue light.
Therefore, development of a light-emitting device (ex. Micro-LED) capable of blocking deep-blue-light and blue-light noise is desirable.
BRIEF SUMMARY OF THE INVENTIONIn accordance with one embodiment of the invention, a light-emitting device is provided. The light-emitting device includes a substrate including a plurality of pixels, each pixel including a plurality of subpixels designed to emit light with different colors. The plurality of subpixels includes a first subpixel designed to emit red light, a second subpixel designed to emit green light, and a third subpixel designed to emit blue light. The first subpixel includes a first light source formed on the substrate, a red light-emitting layer covering the first light source, and a first yellow color filter covering the red light-emitting layer. The second subpixel includes a second light source formed on the substrate, a green light-emitting layer covering the second light source, and a second yellow color filter covering the green light-emitting layer. The third subpixel includes a third light source formed on the substrate.
In some embodiments, the first light source, the second light source and the third light source emit deep blue (DB) light. In some embodiments, the first light source, the second light source and the third light source emit blue (B) light. In some embodiments, the red light-emitting layer includes red phosphor. In some embodiments, the green light-emitting layer includes green phosphor.
In some embodiments, the first yellow color filter and the second yellow color filter include yellow pigments blended in a polymer matrix. In some embodiments, the first yellow color filter and the second yellow color filter have a thickness which is in a range from 0.8 μm to 2.0 μm. In some embodiments, the first yellow color filter and the second yellow color filter have a light transmittance rate which is less than 1% for light with a wavelength of 400 nm to 480 nm. In some embodiments, the first yellow color filter and the second yellow color filter have a light transmittance rate which is greater than 80% for light with a wavelength of 550 nm or above. In some embodiments, the first yellow color filter and the second yellow color filter have a light transmittance rate which is equal to 50% for light with a wavelength of 490 nm to 530 nm. In some embodiments, the first yellow color filter and the second yellow color filter have curved structures or polygonal structures in a cross-section perpendicular to the substrate.
In some embodiments, when each of the first light source, the second light source and the third light source emits deep blue (DB) light, the light-emitting device further includes a blue light-emitting layer covering the third light source. In some embodiments, the blue light-emitting layer includes blue phosphor.
In some embodiments, when each of the first light source, the second light source and the third light source emits deep blue (DB) light, the light-emitting device further includes a first light guiding layer formed between the first light source and the red light-emitting layer, a second light guiding layer formed between the second light source and the green light-emitting layer, and a third light guiding layer formed between the third light source and the blue light-emitting layer. In some embodiments, when each of the first light source, the second light source and the third light source emits blue (B) light, the light-emitting device further includes a first light guiding layer formed between the first light source and the red light-emitting layer, a second light guiding layer formed between the second light source and the green light-emitting layer, and a third light guiding layer covering the third light source.
In some embodiments, the first light source constitutes a first micro LED device, the second light source constitutes a second micro LED device, and the third light source constitutes a third micro LED device. In some embodiments, each of the first micro LED device, the second micro LED device and the third micro LED device has a width which is in a range from 1 μm to 100 μm.
In accordance with one embodiment of the invention, a method for fabricating a light-emitting device is provided. The fabrication method includes the following steps. A substrate with a first light source, a second light source and a third light source mounted thereon is provided. The second light source is located between the first light source and the third light source. The first light source is covered by a red light-emitting layer. The second light source is covered by a green light-emitting layer. A yellow color filter layer is formed over the substrate. A lithography process is performed on the yellow color filter layer to form a first yellow color filter and a second yellow color filter. The first yellow color filter covers the red light-emitting layer. The second yellow color filter covers the green light-emitting layer.
In some embodiments, the step of forming a yellow color filter layer over the substrate is performed by a spin-coating or spray-coating process.
In the present invention, yellow color filters having specific optical properties disposed to cover the red light-emitting layer and the green light-emitting layer are able to fully block the noise of deep-blue light and blue light emitted by the light sources and allow red light and green light to pass through. By disposing the yellow color filters with a specific range of light transmittance rate, the purity of light emitted by the red subpixels and the green subpixels is thus improved. In addition, the yellow color filters comprise curved structures, polygonal structures or other structures with suitable shapes. The specific dimensions of the yellow color filters are also required. For example, the thickness of the yellow color filters is in a range from about 0.8 μm to about 2.0 μm to ensure that the yellow color filters achieve adequate light interception efficiency.
A detailed description is given in the following embodiments with reference to the accompanying drawings.
The present invention can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein:
The following description is of the best-contemplated mode of carrying out the invention. This description is made for the purpose of illustrating the general principles of the invention and should not be taken in a limiting sense. The scope of the invention is best determined by reference to the appended claims.
Referring to
The light-emitting device 10 includes a substrate 12 including a plurality of pixels 14, each pixel 14 including a plurality of subpixels (16a, 16b and 16c) designed to emit light with different colors. The plurality of subpixels (16a, 16b and 16c) includes a first subpixel 16a designed to emit red light (R), a second subpixel 16b designed to emit green light (G), and a third subpixel 16c designed to emit blue light (B). The first subpixel 16a includes a first light source 18a, a red light-emitting layer 20 and a first yellow color filter 30a. The first light source 18a is formed on the substrate 12. The red light-emitting layer 20 covers the first light source 18a. The first yellow color filter 30a covers the red light-emitting layer 20. The second subpixel 16b includes a second light source 18b, a green light-emitting layer 22 and a second yellow color filter 30b. The second light source 18b is formed on the substrate 12. The green light-emitting layer 22 covers the second light source 18b. The second yellow color filter 30b covers the green light-emitting layer 22. The third subpixel 16c includes a third light source 18c formed on the substrate 12.
In
In some embodiments, the first yellow color filter 30a and the second yellow color filter 30b include yellow pigments blended in a polymer matrix. In some embodiments, the first yellow color filter 30a and the second yellow color filter 30b have a thickness “Tv” which is in a range from about 0.8 μm to about 2.0 μm. In some embodiments, the first yellow color filter 30a and the second yellow color filter 30b have a light transmittance rate which is less than about 1% for light with a wavelength of 400 nm to 480 nm. In some embodiments, the first yellow color filter 30a and the second yellow color filter 30b have a light transmittance rate which is greater than about 80% for light with a wavelength of 550 nm or above. In some embodiments, the first yellow color filter 30a and the second yellow color filter 30b have a light transmittance rate which is equal to about 50% for light with a wavelength of 490 nm to 530 nm. The light transmittance rate of the first yellow color filter 30a and the second yellow color filter 30b can be optimized by adjusting the amount of yellow pigment in the polymer matrix. In
In some embodiments, the red light (e.g. 610 nm-780 nm) emitted by the red light-emitting layer 20 will be mixed with a part of the deep blue (DB) light (e.g. 420 nm-450 nm) emitted by the first light source 18a. However, the part of the deep blue (DB) light will be fully blocked and all of the red light will be allowed to pass through by the first yellow color filter 30a covering the red light-emitting layer 20 due to the first yellow color filter 30a having specific optical properties, wherein its light transmittance rate is less than about 1% for light with a wavelength of 400 nm to 480 nm and its light transmittance rate is greater than about 80% for light with a wavelength of 550 nm or above. Similarly, the green light (e.g. 500 nm-550 nm) emitted by the green light-emitting layer 22 will be mixed with a part of the deep blue (DB) light (e.g. 420 nm-450 nm) emitted by the second light source 18b. Also, the part of the deep blue (DB) light will be fully blocked and most of the green light will be allowed to pass through by the second yellow color filter 30b covering the green light-emitting layer 22 due to the second yellow color filter 30b having specific optical properties, wherein its light transmittance rate is less than about 1% for light with a wavelength of 400 nm to 480 nm and its light transmittance rate is equal to about 50% for light with a wavelength of 490 nm to 530 nm. Therefore, in the first subpixel 16a, unwanted deep-blue-light noise will be fully blocked and pure red light will be emitted therefrom. Also, in the second subpixel 16b, unwanted deep-blue-light noise will be fully blocked and pure green light will be emitted therefrom.
In
In
In some embodiments, the first light source 18a constitutes a first micro LED device 42a. The second light source 18b constitutes a second micro LED device 42b. The third light source 18c constitutes a third micro LED device 42c. In some embodiments, each of the first micro LED device 42a, the second micro LED device 42b and the third micro LED device 42c has a width “WLED” which is in a range from about 1 μm to about 100 μm.
Referring to
The light-emitting device 10 includes a substrate 12 including a plurality of pixels 14, each pixel 14 including a plurality of subpixels (16a, 16b and 16c) designed to emit light with different colors. The plurality of subpixels (16a, 16b and 16c) includes a first subpixel 16a designed to emit red light (R), a second subpixel 16b designed to emit green light (G), and a third subpixel 16c designed to emit blue light (B). The first subpixel 16a includes a first light source 18a, a red light-emitting layer 20 and a first yellow color filter 30a. The first light source 18a is formed on the substrate 12. The red light-emitting layer 20 covers the first light source 18a. The first yellow color filter 30a covers the red light-emitting layer 20. The second subpixel 16b includes a second light source 18b, a green light-emitting layer 22 and a second yellow color filter 30b. The second light source 18b is formed on the substrate 12. The green light-emitting layer 22 covers the second light source 18b. The second yellow color filter 30b covers the green light-emitting layer 22. The third subpixel 16c includes a third light source 18c formed on the substrate 12.
In
In some embodiments, the first yellow color filter 30a and the second yellow color filter 30b include yellow pigments blended in a polymer matrix. In some embodiments, the first yellow color filter 30a and the second yellow color filter 30b have a thickness “TY” which is in a range from about 0.8 μm to about 2.0 μm. In some embodiments, the first yellow color filter 30a and the second yellow color filter 30b have a light transmittance rate which is less than about 1% for light with a wavelength of 400 nm to 480 nm. In some embodiments, the first yellow color filter 30a and the second yellow color filter 30b have a light transmittance rate which is greater than about 80% for light with a wavelength of 550 nm or above. In some embodiments, the first yellow color filter 30a and the second yellow color filter 30b have a light transmittance rate which is equal to about 50% for light with a wavelength of 490 nm to 530 nm. The light transmittance rate of the first yellow color filter 30a and the second yellow color filter 30b can be optimized by adjusting the amount of yellow pigment in the polymer matrix. In
In some embodiments, the red light (e.g. 610 nm-780 nm) emitted by the red light-emitting layer 20 will be mixed with a part of the blue (B) light (e.g. 450 nm-485 nm) emitted by the first light source 18a. However, the part of the blue (B) light will be fully blocked and all of the red light will be allowed to pass through by the first yellow color filter 30a covering the red light-emitting layer 20 due to the first yellow color filter 30a having specific optical properties, wherein its light transmittance rate is less than about 1% for light with a wavelength of 400 nm to 480 nm and its light transmittance rate is greater than about 80% for light with a wavelength of 550 nm or above. Similarly, the green light (e.g. 500 nm-550 nm) emitted by the green light-emitting layer 22 will be mixed with a part of the blue (B) light (e.g. 450 nm-485 nm) emitted by the second light source 18b. Also, the part of the blue (B) light will be fully blocked and most of the green light will be allowed to pass through by the second yellow color filter 30b covering the green light-emitting layer 22 due to the second yellow color filter 30b having specific optical properties, wherein its light transmittance rate is less than about 1% for light with a wavelength of 400 nm to 480 nm and its light transmittance rate is equal to about 50% for light with a wavelength of 490 nm to 530 nm. Therefore, in the first subpixel 16a, unwanted blue-light noise will be fully blocked and pure red light will be emitted therefrom. Also, in the second subpixel 16b, unwanted blue-light noise will be fully blocked and pure green light will be emitted therefrom.
In
In some embodiments, the first light source 18a constitutes a first micro LED device 42a. The second light source 18b constitutes a second micro LED device 42b. The third light source 18c constitutes a third micro LED device 42c. In some embodiments, each of the first micro LED device 42a, the second micro LED device 42b and the third micro LED device 42c has a width “WLED” which is in a range from about 1 μm to about 100 μm.
Referring to
The light-emitting device 100 includes a substrate 120 including a plurality of pixels 140, each pixel 140 including a plurality of subpixels (160a, 160b and 160c) designed to emit light with different colors. The plurality of subpixels (160a, 160b and 160c) includes a first subpixel 160a designed to emit red light (R), a second subpixel 160b designed to emit green light (G), and a third subpixel 160c designed to emit blue light (B). The first subpixel 160a includes a first light source 180a, a red light-emitting layer 200 and a first yellow color filter 300a. The first light source 180a is formed on the substrate 120. The red light-emitting layer 200 covers the first light source 180a. The first yellow color filter 300a covers the red light-emitting layer 200. The second subpixel 160b includes a second light source 180b, a green light-emitting layer 220 and a second yellow color filter 300b. The second light source 180b is formed on the substrate 120. The green light-emitting layer 220 covers the second light source 180b. The second yellow color filter 300b covers the green light-emitting layer 220. The third subpixel 160c includes a third light source 180c formed on the substrate 120.
In
In some embodiments, the first yellow color filter 300a and the second yellow color filter 300b include yellow pigments blended in a polymer matrix. In some embodiments, the first yellow color filter 300a and the second yellow color filter 300b have a thickness “TY” which is in a range from about 0.8 μm to about 2.0 μm. In some embodiments, the first yellow color filter 300a and the second yellow color filter 300b have a light transmittance rate which is less than about 1% for light with a wavelength of 400 nm to 480 nm. In some embodiments, the first yellow color filter 300a and the second yellow color filter 300b have a light transmittance rate which is greater than about 80% for light with a wavelength of 550 nm or above. In some embodiments, the first yellow color filter 300a and the second yellow color filter 300b have a light transmittance rate which is equal to about 50% for light with a wavelength of 490 nm to 530 nm. The light transmittance rate of the first yellow color filter 300a and the second yellow color filter 300b can be optimized by adjusting the amount of yellow pigment in the polymer matrix. In
In some embodiments, the red light (e.g. 610 nm-780 nm) emitted by the red light-emitting layer 200 will be mixed with a part of the deep blue (DB) light (e.g. 420 nm-450 nm) emitted by the first light source 180a. However, the part of the deep blue (DB) light will be fully blocked and all of the red light will be allowed to pass through by the first yellow color filter 300a covering the red light-emitting layer 200 due to the first yellow color filter 300a having specific optical properties, wherein its light transmittance rate is less than about 1% for light with a wavelength of 400 nm to 480 nm and its light transmittance rate is greater than about 80% for light with a wavelength of 550 nm or above. Similarly, the green light (e.g. 500 nm-550 nm) emitted by the green light-emitting layer 220 will be mixed with a part of the deep blue (DB) light (e.g. 420 nm-450 nm) emitted by the second light source 180b. Also, the part of the deep blue (DB) light will be fully blocked and most of the green light will be allowed to pass through by the second yellow color filter 300b covering the green light-emitting layer 220 due to the second yellow color filter 300b having specific optical properties, wherein its light transmittance rate is less than about 1% for light with a wavelength of 400 nm to 480 nm and its light transmittance rate is equal to about 50% for light with a wavelength of 490 nm to 530 nm. Therefore, in the first subpixel 160a, unwanted deep-blue-light noise will be fully blocked and pure red light will be emitted therefrom. Also, in the second subpixel 160b, unwanted deep-blue-light noise will be fully blocked and pure green light will be emitted therefrom.
In
In
In some embodiments, the first light source 180a constitutes a first micro LED device 420a. The second light source 180b constitutes a second micro LED device 420b. The third light source 180c constitutes a third micro LED device 420c. In some embodiments, each of the first micro LED device 420a, the second micro LED device 420b and the third micro LED device 420c has a width “WLED” which is in a range from about 1 μm to about 100 μm.
Referring to
The light-emitting device 100 includes a substrate 120 including a plurality of pixels 140, each pixel 140 including a plurality of subpixels (160a, 160b and 160c) designed to emit light with different colors. The plurality of subpixels (160a, 160b and 160c) includes a first subpixel 160a designed to emit red light (R), a second subpixel 160b designed to emit green light (G), and a third subpixel 160c designed to emit blue light (B). The first subpixel 160a includes a first light source 180a, a red light-emitting layer 200 and a first yellow color filter 300a. The first light source 180a is formed on the substrate 120. The red light-emitting layer 200 covers the first light source 180a. The first yellow color filter 300a covers the red light-emitting layer 200. The second subpixel 160b includes a second light source 180b, a green light-emitting layer 220 and a second yellow color filter 300b. The second light source 180b is formed on the substrate 120. The green light-emitting layer 220 covers the second light source 180b. The second yellow color filter 300b covers the green light-emitting layer 220. The third subpixel 160c includes a third light source 180c formed on the substrate 120.
In
In some embodiments, the first yellow color filter 300a and the second yellow color filter 300b include yellow pigments blended in a polymer matrix. In some embodiments, the first yellow color filter 300a and the second yellow color filter 300b have a thickness “TY” which is in a range from about 0.8 μm to about 2.0 μm. In some embodiments, the first yellow color filter 300a and the second yellow color filter 300b have a light transmittance rate which is less than about 1% for light with a wavelength of 400 nm to 480 nm. In some embodiments, the first yellow color filter 300a and the second yellow color filter 300b have a light transmittance rate which is greater than about 80% for light with a wavelength of 550 nm or above. In some embodiments, the first yellow color filter 300a and the second yellow color filter 300b have a light transmittance rate which is equal to about 50% for light with a wavelength of 490 nm to 530 nm. The light transmittance rate of the first yellow color filter 300a and the second yellow color filter 300b can be optimized by adjusting the amount of yellow pigment in the polymer matrix. In
In some embodiments, the red light (e.g. 610 nm-780 nm) emitted by the red light-emitting layer 200 will be mixed with a part of the blue (B) light (e.g. 450 nm-485 nm) emitted by the first light source 180a. However, the part of the blue (B) light will be fully blocked and all of the red light will be allowed to pass through by the first yellow color filter 300a covering the red light-emitting layer 200 due to the first yellow color filter 300a having specific optical properties, wherein its light transmittance rate is less than about 1% for light with a wavelength of 400 nm to 480 nm and its light transmittance rate is greater than about 80% for light with a wavelength of 550 nm or above. Similarly, the green light (e.g. 500 nm-550 nm) emitted by the green light-emitting layer 220 will be mixed with a part of the blue (B) light (e.g. 450 nm-485 nm) emitted by the second light source 180b. Also, the part of the blue (B) light will be fully blocked and most of the green light will be allowed to pass through by the second yellow color filter 300b covering the green light-emitting layer 220 due to the second yellow color filter 300b having specific optical properties, wherein its light transmittance rate is less than about 1% for light with a wavelength of 400 nm to 480 nm and its light transmittance rate is equal to about 50% for light with a wavelength of 490 nm to 530 nm. Therefore, in the first subpixel 160a, unwanted blue-light noise will be fully blocked and pure red light will be emitted therefrom. Also, in the second subpixel 160b, unwanted blue-light noise will be fully blocked and pure green light will be emitted therefrom.
In
In some embodiments, the first light source 180a constitutes a first micro LED device 420a. The second light source 180b constitutes a second micro LED device 420b. The third light source 180c constitutes a third micro LED device 420c. In some embodiments, each of the first micro LED device 420a, the second micro LED device 420b and the third micro LED device 420c has a width “WLED” which is in a range from about 1 μm to about 100 μm.
Referring to
Referring to
Referring to
Referring to
In some embodiments, the step of forming the yellow color filter layer 30 over the substrate 12 is performed by a spin-coating or spray-coating process.
In the present invention, the yellow color filters having specific optical properties disposed to cover the red light-emitting layer and the green light-emitting layer are able to fully block noise of deep-blue light and blue light emitted by the light sources and allow red light and green light to pass through. By disposing the yellow color filters with a specific range of light transmittance rate, the purity of light emitted by the red subpixels and the green subpixels is thus improved. In addition, the yellow color filters comprise curved structures, polygonal structures or other structures with suitable shapes. The specific dimensions of the yellow color filters are also required. For example, the thickness of the yellow color filters is in a range from about 0.8 μm to about 2.0 μm to ensure that the yellow color filters achieve adequate light interception efficiency.
While the invention has been described by way of example and in terms of preferred embodiment, it should be understood that the invention is not limited thereto. On the contrary, it is intended to cover various modifications and similar arrangements (as would be apparent to those skilled in the art). Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.
Claims
1. A light-emitting device, comprising:
- a substrate comprising a plurality of pixels, each pixel comprising a plurality of subpixels designed to emit light with different colors, wherein the plurality of subpixels comprise:
- a first subpixel designed to emit red light, comprising: a first light source formed on the substrate; a red light-emitting layer covering the first light source; and a first yellow color filter covering the red light-emitting layer;
- a second subpixel designed to emit green light, comprising: a second light source formed on the substrate; a green light-emitting layer covering the second light source; and a second yellow color filter covering the green light-emitting layer; and
- a third subpixel designed to emit blue light, comprising: a third light source formed on the substrate,
- wherein the first yellow color filter and the second yellow color filter comprise yellow pigments blended in a polymer matrix.
2. The light-emitting device as claimed in claim 1, wherein the first light source, the second light source and the third light source emit deep blue light.
3. The light-emitting device as claimed in claim 2, further comprising a blue light-emitting layer covering the third light source.
4. The light-emitting device as claimed in claim 3, wherein the blue light-emitting layer comprises blue phosphor.
5. The light-emitting device as claimed in claim 3, further comprising a first light guiding layer formed between the first light source and the red light-emitting layer, a second light guiding layer formed between the second light source and the green light-emitting layer, and a third light guiding layer formed between the third light source and the blue light-emitting layer.
6. The light-emitting device as claimed in claim 1, wherein the first light source, the second light source and the third light source emit blue light.
7. The light-emitting device as claimed in claim 6, further comprising a first light guiding layer formed between the first light source and the red light-emitting layer, a second light guiding layer formed between the second light source and the green light-emitting layer, and a third light guiding layer covering the third light source.
8. The light-emitting device as claimed in claim 1, wherein the red light-emitting layer comprises red phosphor.
9. The light-emitting device as claimed in claim 1, wherein the green light-emitting layer comprises green phosphor.
10. The light-emitting device as claimed in claim 1, wherein the first yellow color filter and the second yellow color filter have a thickness which is in a range from 0.8 μm to 2.0 μm.
11. The light-emitting device as claimed in claim 1, wherein the first light source constitutes a first micro LED device, the second light source constitutes a second micro LED device, and the third light source constitutes a third micro LED device.
12. The light-emitting device as claimed in claim 11, wherein each of the first micro LED device, the second micro LED device and the third micro LED device has a width which is in a range from 1 μm to 100 μm.
13. A light emitting device, comprising:
- a substrate comprising a plurality of pixels, each pixel comprising a plurality of subpixels designed to emit light with different colors, wherein the plurality of subpixels comprise:
- a first subpixel designed to emit red light, comprising: a first light source formed on the substrate; a red light-emitting layer covering the first light source; and a first yellow color filter covering the red light-emitting layer;
- a second subpixel designed to emit green light, comprising: a second light source formed on the substrate; a green light-emitting layer covering the second light source; and a second yellow color filter covering the green light-emitting layer; and
- a third subpixel designed to emit blue light, comprising: a third light source formed on the substrate,
- wherein the first yellow color filter and the second yellow color filter have a light transmittance rate which is less than 1% for light with a wavelength of 400 nm to 480 nm.
14. A light-emitting device, comprising:
- a substrate comprising a plurality of pixels, each pixel comprising a plurality of subpixels designed to emit light with different colors, wherein the plurality of subpixels comprise:
- a first subpixel designed to emit red light, comprising: a first light source formed on the substrate; a red light-emitting layer covering the first light source; and a first yellow color filter covering the red light-emitting layer;
- a second subpixel designed to emit green light, comprising: a second light source formed on the substrate; a green light-emitting layer covering the second light source; and a second yellow color filter covering the green light-emitting layer; and
- a third subpixel designed to emit blue light, comprising: a third light source formed on the substrate,
- wherein the first yellow color filter and the second yellow color filter have a light transmittance rate which is greater than 80% for light with a wavelength of 550 nm or above.
15. A light-emitting device, comprising:
- a substrate comprising a plurality of pixels, each pixel comprising a plurality of subpixels designed to emit light with different colors, wherein the plurality of subpixels comprise:
- a first subpixel designed to emit red light, comprising: a first light source formed on the substrate; a red light-emitting layer covering the first light source; and a first yellow color filter covering the red light-emitting layer;
- a second subpixel designed to emit green light, comprising: a second light source formed on the substrate; a green light-emitting layer covering the second light source; and a second yellow color filter covering the green light-emitting layer; and
- a third subpixel designed to emit blue light, comprising: a third light source formed on the substrate,
- wherein the first yellow color filter and the second yellow color filter have a light transmittance rate which is equal to 50% for light with a wavelength of 490 nm to 530 nm.
16. A light-emitting device, comprising:
- a substrate comprising a plurality of pixels, each pixel comprising a plurality of subpixels designed to emit light with different colors, wherein the plurality of subpixels comprise:
- a first subpixel designed to emit red light, comprising: a first light source formed on the substrate; a red light-emitting layer covering the first light source; and a first yellow color filter covering the red light-emitting layer;
- a second subpixel designed to emit green light, comprising: a second light source formed on the substrate; a green light-emitting layer covering the second light source; and a second yellow color filter covering the green light-emitting layer; and
- a third subpixel designed to emit blue light, comprising: a third light source formed on the substrate,
- wherein the first yellow color filter and the second yellow color filter have curved structures or polygonal structures in a cross-section perpendicular to the substrate.
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Type: Grant
Filed: Oct 31, 2018
Date of Patent: Oct 13, 2020
Patent Publication Number: 20200135985
Assignee: Visera Technologies Company Limited (Hsin-Chu)
Inventors: Wei-Ko Wang (Taoyuan), Chia-Hui Wu (Lunbei Township, Yunlin County)
Primary Examiner: Quoc D Hoang
Application Number: 16/176,970
International Classification: H01L 33/50 (20100101); H01L 27/15 (20060101);